Title :
Experimental study of collective effects in BEP storage ring with high stored current
Author :
Danilov, V. ; Koop, I. ; Lysenko, A. ; Militsyn, B. ; Nesterenko, I. ; Perevedentsev, E. ; Pozdeev, E. ; Ptitsin, V. ; Shatunov, Yu ; Vasserman, I.
Author_Institution :
Budker Inst. of Nucl. Phys., Acad. of Sci., Novosibirsk, Russia
Abstract :
The results of extensive investigation of beam dynamics with high current in BEP booster are presented. Strong bunch lengthening due to the potential well distortion by the inductive impedance was observed on the background of the multiple intrabeam scattering and of the ion accumulation (in the e- beam). The octupole and sextupole corrections enabled control of collective damping of the head-tail modes. Fast damping is also observed at zero chromaticity, this is attributed to the injection kickers acting as transmission lines. The proper tuning of the nonlinearity corrections cures the transverse instabilities and enables capability to store up to 0.8A current in a single bunch
Keywords :
beam handling techniques; electron accelerators; particle beam diagnostics; storage rings; tuning; BEP storage ring; beam dynamics; booster; bunch lengthening; collective effects; head-tail modes; octupole corrections; sextupole corrections; transverse instabilities; tuning; Damping; Electrons; Energy measurement; Nonlinear optics; Optical scattering; Particle beam measurements; Positrons; Resonance; Size measurement; Storage rings;
Conference_Titel :
Particle Accelerator Conference, 1993., Proceedings of the 1993
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-1203-1
DOI :
10.1109/PAC.1993.309767
